mirror of
https://github.com/crystalidea/qt6windows7.git
synced 2024-11-27 14:38:28 +08:00
111 lines
2.9 KiB
C++
111 lines
2.9 KiB
C++
// Copyright (C) 2016 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
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#include "model.h"
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#include <QPixmap>
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Model::Model(int rows, int columns, QObject *parent)
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: QAbstractItemModel(parent),
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services(QPixmap(":/images/services.png")),
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rc(rows),
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cc(columns),
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tree(new QList<Node>(rows, Node()))
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{
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}
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Model::~Model()
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{
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delete tree;
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}
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QModelIndex Model::index(int row, int column, const QModelIndex &parent) const
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{
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if (row < rc && row >= 0 && column < cc && column >= 0) {
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Node *parentNode = static_cast<Node*>(parent.internalPointer());
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Node *childNode = node(row, parentNode);
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if (childNode)
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return createIndex(row, column, childNode);
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}
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return QModelIndex();
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}
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QModelIndex Model::parent(const QModelIndex &child) const
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{
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if (child.isValid()) {
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Node *childNode = static_cast<Node*>(child.internalPointer());
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Node *parentNode = parent(childNode);
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if (parentNode)
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return createIndex(row(parentNode), 0, parentNode);
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}
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return QModelIndex();
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}
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int Model::rowCount(const QModelIndex &parent) const
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{
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return (parent.isValid() && parent.column() != 0) ? 0 : rc;
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}
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int Model::columnCount(const QModelIndex &parent) const
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{
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Q_UNUSED(parent);
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return cc;
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}
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QVariant Model::data(const QModelIndex &index, int role) const
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{
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if (!index.isValid())
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return QVariant();
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if (role == Qt::DisplayRole)
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return QVariant("Item " + QString::number(index.row()) + ':' + QString::number(index.column()));
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if (role == Qt::DecorationRole) {
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if (index.column() == 0)
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return iconProvider.icon(QFileIconProvider::Folder);
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return iconProvider.icon(QFileIconProvider::File);
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}
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return QVariant();
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}
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QVariant Model::headerData(int section, Qt::Orientation orientation, int role) const
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{
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if (role == Qt::DisplayRole)
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return QString::number(section);
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if (role == Qt::DecorationRole)
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return QVariant::fromValue(services);
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return QAbstractItemModel::headerData(section, orientation, role);
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}
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bool Model::hasChildren(const QModelIndex &parent) const
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{
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if (parent.isValid() && parent.column() != 0)
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return false;
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return rc > 0 && cc > 0;
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}
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Qt::ItemFlags Model::flags(const QModelIndex &index) const
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{
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if (!index.isValid())
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return {};
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return Qt::ItemIsDragEnabled|QAbstractItemModel::flags(index);
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}
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Model::Node *Model::node(int row, Node *parent) const
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{
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if (parent && !parent->children)
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parent->children = new QList<Node>(rc, Node(parent));
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QList<Node> *v = parent ? parent->children : tree;
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return const_cast<Node*>(&(v->at(row)));
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}
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Model::Node *Model::parent(Node *child) const
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{
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return child ? child->parent : nullptr;
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}
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int Model::row(Node *node) const
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{
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const Node *first = node->parent ? &(node->parent->children->at(0)) : &(tree->at(0));
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return node - first;
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}
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